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/* SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB */
/* Copyright (c) 2015 - 2021 Intel Corporation */
#ifndef IRDMA_CM_H
#define IRDMA_CM_H
#define IRDMA_MPA_REQUEST_ACCEPT 1
#define IRDMA_MPA_REQUEST_REJECT 2
/* IETF MPA -- defines */
#define IEFT_MPA_KEY_REQ "MPA ID Req Frame"
#define IEFT_MPA_KEY_REP "MPA ID Rep Frame"
#define IETF_MPA_KEY_SIZE 16
#define IETF_MPA_VER 1
#define IETF_MAX_PRIV_DATA_LEN 512
#define IETF_MPA_FRAME_SIZE 20
#define IETF_RTR_MSG_SIZE 4
#define IETF_MPA_V2_FLAG 0x10
#define SNDMARKER_SEQNMASK 0x000001ff
#define IRDMA_MAX_IETF_SIZE 32
/* IETF RTR MSG Fields */
#define IETF_PEER_TO_PEER 0x8000
#define IETF_FLPDU_ZERO_LEN 0x4000
#define IETF_RDMA0_WRITE 0x8000
#define IETF_RDMA0_READ 0x4000
#define IETF_NO_IRD_ORD 0x3fff
#define MAX_PORTS 65536
#define IRDMA_PASSIVE_STATE_INDICATED 0
#define IRDMA_DO_NOT_SEND_RESET_EVENT 1
#define IRDMA_SEND_RESET_EVENT 2
#define MAX_IRDMA_IFS 4
#define SET_ACK 1
#define SET_SYN 2
#define SET_FIN 4
#define SET_RST 8
#define TCP_OPTIONS_PADDING 3
#define IRDMA_DEFAULT_RETRYS 64
#define IRDMA_DEFAULT_RETRANS 8
#define IRDMA_DEFAULT_TTL 0x40
#define IRDMA_DEFAULT_RTT_VAR 6
#define IRDMA_DEFAULT_SS_THRESH 0x3fffffff
#define IRDMA_DEFAULT_REXMIT_THRESH 8
#define IRDMA_RETRY_TIMEOUT HZ
#define IRDMA_SHORT_TIME 10
#define IRDMA_LONG_TIME (2 * HZ)
#define IRDMA_MAX_TIMEOUT ((unsigned long)(12 * HZ))
#define IRDMA_CM_HASHTABLE_SIZE 1024
#define IRDMA_CM_TCP_TIMER_INTERVAL 3000
#define IRDMA_CM_DEFAULT_MTU 1540
#define IRDMA_CM_DEFAULT_FRAME_CNT 10
#define IRDMA_CM_THREAD_STACK_SIZE 256
#define IRDMA_CM_DEFAULT_RCV_WND 64240
#define IRDMA_CM_DEFAULT_RCV_WND_SCALED 0x3FFFC
#define IRDMA_CM_DEFAULT_RCV_WND_SCALE 2
#define IRDMA_CM_DEFAULT_FREE_PKTS 10
#define IRDMA_CM_FREE_PKT_LO_WATERMARK 2
#define IRDMA_CM_DEFAULT_MSS 536
#define IRDMA_CM_DEFAULT_MPA_VER 2
#define IRDMA_CM_DEFAULT_SEQ 0x159bf75f
#define IRDMA_CM_DEFAULT_LOCAL_ID 0x3b47
#define IRDMA_CM_DEFAULT_SEQ2 0x18ed5740
#define IRDMA_CM_DEFAULT_LOCAL_ID2 0xb807
#define IRDMA_MAX_CM_BUF (IRDMA_MAX_IETF_SIZE + IETF_MAX_PRIV_DATA_LEN)
enum ietf_mpa_flags {
IETF_MPA_FLAGS_REJECT = 0x20,
IETF_MPA_FLAGS_CRC = 0x40,
IETF_MPA_FLAGS_MARKERS = 0x80,
};
enum irdma_timer_type {
IRDMA_TIMER_TYPE_SEND,
IRDMA_TIMER_TYPE_CLOSE,
};
enum option_nums {
OPTION_NUM_EOL,
OPTION_NUM_NONE,
OPTION_NUM_MSS,
OPTION_NUM_WINDOW_SCALE,
OPTION_NUM_SACK_PERM,
OPTION_NUM_SACK,
OPTION_NUM_WRITE0 = 0xbc,
};
/* cm node transition states */
enum irdma_cm_node_state {
IRDMA_CM_STATE_UNKNOWN,
IRDMA_CM_STATE_INITED,
IRDMA_CM_STATE_LISTENING,
IRDMA_CM_STATE_SYN_RCVD,
IRDMA_CM_STATE_SYN_SENT,
IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED,
IRDMA_CM_STATE_ESTABLISHED,
IRDMA_CM_STATE_ACCEPTING,
IRDMA_CM_STATE_MPAREQ_SENT,
IRDMA_CM_STATE_MPAREQ_RCVD,
IRDMA_CM_STATE_MPAREJ_RCVD,
IRDMA_CM_STATE_OFFLOADED,
IRDMA_CM_STATE_FIN_WAIT1,
IRDMA_CM_STATE_FIN_WAIT2,
IRDMA_CM_STATE_CLOSE_WAIT,
IRDMA_CM_STATE_TIME_WAIT,
IRDMA_CM_STATE_LAST_ACK,
IRDMA_CM_STATE_CLOSING,
IRDMA_CM_STATE_LISTENER_DESTROYED,
IRDMA_CM_STATE_CLOSED,
};
enum mpa_frame_ver {
IETF_MPA_V1 = 1,
IETF_MPA_V2 = 2,
};
enum mpa_frame_key {
MPA_KEY_REQUEST,
MPA_KEY_REPLY,
};
enum send_rdma0 {
SEND_RDMA_READ_ZERO = 1,
SEND_RDMA_WRITE_ZERO = 2,
};
enum irdma_tcpip_pkt_type {
IRDMA_PKT_TYPE_UNKNOWN,
IRDMA_PKT_TYPE_SYN,
IRDMA_PKT_TYPE_SYNACK,
IRDMA_PKT_TYPE_ACK,
IRDMA_PKT_TYPE_FIN,
IRDMA_PKT_TYPE_RST,
};
enum irdma_cm_listener_state {
IRDMA_CM_LISTENER_PASSIVE_STATE = 1,
IRDMA_CM_LISTENER_ACTIVE_STATE = 2,
IRDMA_CM_LISTENER_EITHER_STATE = 3,
};
/* CM event codes */
enum irdma_cm_event_type {
IRDMA_CM_EVENT_UNKNOWN,
IRDMA_CM_EVENT_ESTABLISHED,
IRDMA_CM_EVENT_MPA_REQ,
IRDMA_CM_EVENT_MPA_CONNECT,
IRDMA_CM_EVENT_MPA_ACCEPT,
IRDMA_CM_EVENT_MPA_REJECT,
IRDMA_CM_EVENT_MPA_ESTABLISHED,
IRDMA_CM_EVENT_CONNECTED,
IRDMA_CM_EVENT_RESET,
IRDMA_CM_EVENT_ABORTED,
};
struct ietf_mpa_v1 {
u8 key[IETF_MPA_KEY_SIZE];
u8 flags;
u8 rev;
__be16 priv_data_len;
u8 priv_data[];
};
struct ietf_rtr_msg {
__be16 ctrl_ird;
__be16 ctrl_ord;
};
struct ietf_mpa_v2 {
u8 key[IETF_MPA_KEY_SIZE];
u8 flags;
u8 rev;
__be16 priv_data_len;
struct ietf_rtr_msg rtr_msg;
u8 priv_data[];
};
struct option_base {
u8 optionnum;
u8 len;
};
struct option_mss {
u8 optionnum;
u8 len;
__be16 mss;
};
struct option_windowscale {
u8 optionnum;
u8 len;
u8 shiftcount;
};
union all_known_options {
char eol;
struct option_base base;
struct option_mss mss;
struct option_windowscale windowscale;
};
struct irdma_timer_entry {
struct list_head list;
unsigned long timetosend; /* jiffies */
struct irdma_puda_buf *sqbuf;
u32 type;
u32 retrycount;
u32 retranscount;
u32 context;
u32 send_retrans;
int close_when_complete;
};
/* CM context params */
struct irdma_cm_tcp_context {
u8 client;
u32 loc_seq_num;
u32 loc_ack_num;
u32 rem_ack_num;
u32 rcv_nxt;
u32 loc_id;
u32 rem_id;
u32 snd_wnd;
u32 max_snd_wnd;
u32 rcv_wnd;
u32 mss;
u8 snd_wscale;
u8 rcv_wscale;
};
struct irdma_apbvt_entry {
struct hlist_node hlist;
u32 use_cnt;
u16 port;
};
struct irdma_cm_listener {
struct list_head list;
struct iw_cm_id *cm_id;
struct irdma_cm_core *cm_core;
struct irdma_device *iwdev;
struct list_head child_listen_list;
struct irdma_apbvt_entry *apbvt_entry;
enum irdma_cm_listener_state listener_state;
refcount_t refcnt;
atomic_t pend_accepts_cnt;
u32 loc_addr[4];
u32 reused_node;
int backlog;
u16 loc_port;
u16 vlan_id;
u8 loc_mac[ETH_ALEN];
u8 user_pri;
u8 tos;
bool qhash_set:1;
bool ipv4:1;
};
struct irdma_kmem_info {
void *addr;
u32 size;
};
struct irdma_mpa_priv_info {
const void *addr;
u32 size;
};
struct irdma_cm_node {
struct irdma_qp *iwqp;
struct irdma_device *iwdev;
struct irdma_sc_dev *dev;
struct irdma_cm_tcp_context tcp_cntxt;
struct irdma_cm_core *cm_core;
struct irdma_timer_entry *send_entry;
struct irdma_timer_entry *close_entry;
struct irdma_cm_listener *listener;
struct list_head timer_entry;
struct list_head reset_entry;
struct list_head teardown_entry;
struct irdma_apbvt_entry *apbvt_entry;
struct rcu_head rcu_head;
struct irdma_mpa_priv_info pdata;
struct irdma_sc_ah *ah;
union {
struct ietf_mpa_v1 mpa_frame;
struct ietf_mpa_v2 mpa_v2_frame;
};
struct irdma_kmem_info mpa_hdr;
struct iw_cm_id *cm_id;
struct hlist_node list;
struct completion establish_comp;
spinlock_t retrans_list_lock; /* protect CM node rexmit updates*/
atomic_t passive_state;
refcount_t refcnt;
enum irdma_cm_node_state state;
enum send_rdma0 send_rdma0_op;
enum mpa_frame_ver mpa_frame_rev;
u32 loc_addr[4], rem_addr[4];
u16 loc_port, rem_port;
int apbvt_set;
int accept_pend;
u16 vlan_id;
u16 ird_size;
u16 ord_size;
u16 mpav2_ird_ord;
u16 lsmm_size;
u8 pdata_buf[IETF_MAX_PRIV_DATA_LEN];
u8 loc_mac[ETH_ALEN];
u8 rem_mac[ETH_ALEN];
u8 user_pri;
u8 tos;
bool ack_rcvd:1;
bool qhash_set:1;
bool ipv4:1;
bool snd_mark_en:1;
bool rcv_mark_en:1;
bool do_lpb:1;
bool accelerated:1;
};
/* Used by internal CM APIs to pass CM information*/
struct irdma_cm_info {
struct iw_cm_id *cm_id;
u16 loc_port;
u16 rem_port;
u32 loc_addr[4];
u32 rem_addr[4];
u32 qh_qpid;
u16 vlan_id;
int backlog;
u8 user_pri;
u8 tos;
bool ipv4;
};
struct irdma_cm_event {
enum irdma_cm_event_type type;
struct irdma_cm_info cm_info;
struct work_struct event_work;
struct irdma_cm_node *cm_node;
};
struct irdma_cm_core {
struct irdma_device *iwdev;
struct irdma_sc_dev *dev;
struct list_head listen_list;
DECLARE_HASHTABLE(cm_hash_tbl, 8);
DECLARE_HASHTABLE(apbvt_hash_tbl, 8);
struct timer_list tcp_timer;
struct workqueue_struct *event_wq;
spinlock_t ht_lock; /* protect CM node (active side) list */
spinlock_t listen_list_lock; /* protect listener list */
spinlock_t apbvt_lock; /*serialize apbvt add/del entries*/
u64 stats_nodes_created;
u64 stats_nodes_destroyed;
u64 stats_listen_created;
u64 stats_listen_destroyed;
u64 stats_listen_nodes_created;
u64 stats_listen_nodes_destroyed;
u64 stats_lpbs;
u64 stats_accepts;
u64 stats_rejects;
u64 stats_connect_errs;
u64 stats_passive_errs;
u64 stats_pkt_retrans;
u64 stats_backlog_drops;
struct irdma_puda_buf *(*form_cm_frame)(struct irdma_cm_node *cm_node,
struct irdma_kmem_info *options,
struct irdma_kmem_info *hdr,
struct irdma_mpa_priv_info *pdata,
u8 flags);
int (*cm_create_ah)(struct irdma_cm_node *cm_node, bool wait);
void (*cm_free_ah)(struct irdma_cm_node *cm_node);
};
int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node,
struct irdma_puda_buf *sqbuf,
enum irdma_timer_type type, int send_retrans,
int close_when_complete);
static inline u8 irdma_tos2dscp(u8 tos)
{
#define IRDMA_DSCP_VAL GENMASK(7, 2)
return (u8)FIELD_GET(IRDMA_DSCP_VAL, tos);
}
int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
int irdma_create_listen(struct iw_cm_id *cm_id, int backlog);
int irdma_destroy_listen(struct iw_cm_id *cm_id);
int irdma_add_arp(struct irdma_pci_f *rf, u32 *ip, bool ipv4, const u8 *mac);
void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
struct irdma_cm_info *nfo,
bool disconnect_all);
int irdma_cm_start(struct irdma_device *dev);
int irdma_cm_stop(struct irdma_device *dev);
bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr);
bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr);
int irdma_arp_table(struct irdma_pci_f *rf, u32 *ip_addr, bool ipv4,
const u8 *mac_addr, u32 action);
void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
u32 *ipaddr, bool ipv4, bool ifup);
bool irdma_port_in_use(struct irdma_cm_core *cm_core, u16 port);
void irdma_send_ack(struct irdma_cm_node *cm_node);
void irdma_lpb_nop(struct irdma_sc_qp *qp);
void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node);
void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node);
#endif /* IRDMA_CM_H */